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Please use this identifier to cite or link to this item: http://hdl.handle.net/1942/2419

Title: Synthesis of (Bi,La)(4)Ti3O12 by a new aqueous solution-gel route
Authors: HARDY, An
MONDELAERS, Dirk
VAN BAEL, Marlies
MULLENS, Jules
VAN POUCKE, Lucien
VANHOYLAND, Geert
D'HAEN, Jan
Issue Date: 2004
Publisher: ELSEVIER SCI LTD
Citation: JOURNAL OF THE EUROPEAN CERAMIC SOCIETY, 24(6). p. 905-909
Abstract: A new aqueous solution-get route. for the synthesis of ferroelectric lanthanum substituted bismuth titanate was developed, based on aqueous Bi3+ - and La3+ -citrate solutions and an aqueous peroxocitrato-Ti(IV) solution. A homogeneous, amorphous precursor gel was prepared by evaporation of the BLT precursor solution. The homogeneity was maintained throughout the entire thermooxidative decomposition of the gel, as shown by TEM measurements on freestanding thin films. This molecular scale mixing and high degree of homogeneity led to the direct crystallization of the Aurivillius phase from the amorphous phase. As a consequence the crystallization temperature was as low as 525 degreesC, which was shown by a high temperature X-ray diffraction study of the stoichiometric precursor. The addition of an excess of Bi3+ decreased the crystallization temperature, but also introduced a Bi2O3 secondary phase. (C) 2003 Elsevier Ltd. All rights reserved.
Notes: Limburgs Univ Ctr, Lab Inorgan, B-3590 Diepenbeek, Belgium. IMOMEC, B-3590 Diepenbeek, Belgium.Mullens, J, Limburgs Univ Ctr, Lab Inorgan, Univ Campus, B-3590 Diepenbeek, Belgium.jules.mullens@luc.ac.be
URI: http://hdl.handle.net/1942/2419
DOI: 10.1016/S0955-2219(03)00420-5
ISI #: 000189247800002
ISSN: 0955-2219
Category: A1
Type: Journal Contribution
Validation: ecoom, 2005
Appears in Collections: Research publications

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